Warmer weather makes bunches of bananas turn brown quicker, so before you have to throw them away, freeze them to use for smoothies or banana bread. Just unpeel your nanner, wrap it in plastic wrap, and pop it in the freezer. You can add the frozen banana right to the blender for a fruit smoothie, and for banana bread or muffins, allow them to thaw first. It's a helpful time- and money-saver.